/* ── Reset & base ────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg:        #090910;
  --bg2:       #12121e;
  --bg3:       #1a1a2a;
  --surface:   #1e1e30;
  --border:    #2a2a40;
  --text:      #e8e8f0;
  --text-dim:  #7070a0;
  --radius:    16px;
  --radius-sm: 10px;
  --font:      -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --accent:    #9b6bff;  /* default — overridden per-persona */
  --trans:     all 0.25s ease;
}

html, body {
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  -webkit-font-smoothing: antialiased;
  overscroll-behavior: none;
  user-select: none;
  -webkit-user-select: none;
}

#app {
  height: 100%;
  position: relative;
  overflow: hidden;
  max-width: 600px;
  margin: 0 auto;
}

/* ── Screens ─────────────────────────────────────────────────────────────── */
.screen {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  opacity: 0;
  pointer-events: none;
  transform: translateX(30px);
  transition: opacity 0.3s ease, transform 0.3s ease;
}
.screen.active {
  opacity: 1;
  pointer-events: all;
  transform: translateX(0);
}
.screen.slide-out {
  opacity: 0;
  transform: translateX(-30px);
}

/* ── Header ──────────────────────────────────────────────────────────────── */
.header {
  display: flex;
  align-items: center;
  padding: 16px 20px 12px;
  gap: 12px;
  flex-shrink: 0;
}

.header-title {
  font-size: 1.1rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--text);
}

.logo {
  font-size: 1.4rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: lowercase;
  color: var(--text);
  flex: 1;
}

.back-btn {
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text);
  width: 38px;
  height: 38px;
  border-radius: 50%;
  font-size: 1.1rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: var(--trans);
}
.back-btn:active { transform: scale(0.92); }

/* ── Home: persona grid ──────────────────────────────────────────────────── */
#screen-home {
  background: var(--bg);
}

.persona-grid {
  flex: 1;
  overflow-y: auto;
  padding: 8px 16px 24px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

@media (min-width: 480px) {
  .persona-grid { grid-template-columns: 1fr 1fr 1fr; }
}

.persona-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 12px 16px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  transition: var(--trans);
  position: relative;
  overflow: hidden;
}

.persona-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--accent);
  opacity: 0;
  transition: opacity 0.2s;
  border-radius: inherit;
}

.persona-card:active::before { opacity: 0.08; }

.persona-card:active {
  transform: scale(0.96);
  border-color: var(--accent);
}

.card-avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  object-fit: cover;
  object-position: top center;
  border: 2px solid var(--border);
  transition: var(--trans);
}

.persona-card:active .card-avatar {
  border-color: var(--accent);
  box-shadow: 0 0 16px color-mix(in srgb, var(--accent) 40%, transparent);
}

.card-name {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text);
  text-align: center;
}

.card-vibe {
  font-size: 0.72rem;
  color: var(--text-dim);
  text-align: center;
  line-height: 1.3;
}

/* ── PTT screen ──────────────────────────────────────────────────────────── */
#screen-ptt {
  background: var(--bg);
}

.ptt-body {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0;
  padding: 0 24px;
}

/* Avatar */
.avatar-wrap {
  position: relative;
  width: min(240px, 52vw);
  height: min(240px, 52vw);
  margin-bottom: 20px;
}

.ptt-avatar {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  object-fit: cover;
  object-position: top center;
  border: 3px solid var(--border);
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
  position: relative;
  z-index: 2;
}

/* Pulse ring — visible during SPEAKING */
.avatar-ring {
  position: absolute;
  inset: -6px;
  border-radius: 50%;
  border: 2px solid var(--accent);
  opacity: 0;
  z-index: 1;
  transition: opacity 0.3s;
}

.state-speaking .ptt-avatar {
  border-color: var(--accent);
  box-shadow: 0 0 32px color-mix(in srgb, var(--accent) 35%, transparent),
              0 0 64px color-mix(in srgb, var(--accent) 15%, transparent);
}

.state-speaking .avatar-ring {
  opacity: 1;
  animation: ring-pulse 1.6s ease-in-out infinite;
}

.state-recording .ptt-avatar {
  border-color: #ff4757;
  box-shadow: 0 0 24px rgba(255, 71, 87, 0.35);
}

@keyframes ring-pulse {
  0%, 100% { transform: scale(1);    opacity: 0.6; }
  50%       { transform: scale(1.06); opacity: 1;   }
}

/* Status */
.ptt-status {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-dim);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  height: 20px;
  transition: color 0.25s;
  margin-bottom: 18px;
}

.state-recording .ptt-status { color: #ff4757; }
.state-processing .ptt-status { color: var(--accent); }
.state-speaking .ptt-status { color: var(--accent); }
.state-error .ptt-status { color: #ff6b81; }

/* Waveform canvas */
#waveform {
  width: 100%;
  max-width: 280px;
  height: 48px;
  opacity: 0;
  transition: opacity 0.3s;
  margin-bottom: 6px;
}

.state-recording #waveform { opacity: 1; }

/* PTT button */
.ptt-area {
  padding: 24px 24px 32px;
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  width: 100%;
}

.ptt-btn {
  width: min(200px, 56vw);
  height: min(200px, 56vw);
  border-radius: 50%;
  border: 3px solid var(--border);
  background: var(--bg3);
  color: var(--text);
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: background 0.2s, border-color 0.2s, transform 0.15s, box-shadow 0.2s;
  -webkit-tap-highlight-color: transparent;
  touch-action: none;
}

.ptt-btn-icon {
  font-size: 2.2rem;
  line-height: 1;
  pointer-events: none;
}

.ptt-btn-label {
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--text-dim);
  pointer-events: none;
}

/* button states */
.ptt-btn:not(:disabled):active,
.ptt-btn.pressed {
  transform: scale(0.93);
  background: color-mix(in srgb, var(--accent) 12%, var(--bg3));
  border-color: var(--accent);
  box-shadow: 0 0 28px color-mix(in srgb, var(--accent) 30%, transparent);
}

.state-recording .ptt-btn {
  background: color-mix(in srgb, #ff4757 12%, var(--bg3));
  border-color: #ff4757;
  box-shadow: 0 0 24px rgba(255,71,87,0.3);
}

.ptt-btn:disabled {
  opacity: 0.5;
  cursor: default;
}

/* spinner for processing */
.spinner {
  display: none;
  width: 36px;
  height: 36px;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.75s linear infinite;
}

.state-processing .ptt-btn-icon { display: none; }
.state-processing .spinner { display: block; }

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* Transcript */
.transcript-wrap {
  width: 100%;
  max-width: 560px;
  padding: 0 20px 8px;
  flex-shrink: 0;
}

.transcript-toggle {
  font-size: 0.72rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  cursor: pointer;
  padding: 6px 0;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: color 0.2s;
}
.transcript-toggle:hover { color: var(--text); }

.transcript-log {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease;
}

.transcript-log.open {
  max-height: 180px;
  overflow-y: auto;
}

.transcript-entry {
  padding: 6px 0;
  border-top: 1px solid var(--border);
  font-size: 0.8rem;
  line-height: 1.45;
}

.transcript-entry .who {
  font-weight: 600;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 2px;
}

.transcript-entry.user .who { color: var(--text-dim); }
.transcript-entry.agent .who { color: var(--accent); }

/* ── Scrollbar ───────────────────────────────────────────────────────────── */
::-webkit-scrollbar { width: 4px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 2px; }